Check the TYPE , LENGTH and any FORMAT that is attached to your variable.
If the TYPE is NUM then check the range of the values using PROC MEANS or PROC SQL.
If the variable has DATE values then the range of values would probably fall in the interval from today's date, which is day number 22,749 down to the earliest date in your data. For example if you date goes back to beginning of 1960 then the smallest value is zero. If it goes back further you might have negative numbers.
If the variable has instead DATETIME values (number of seconds) then value falls in the interval from now, which second number 1,965,578,801 down to the earliest timepoint in your data. For example if you datetime values go back the start of 1960 then the smallest value is zero. If it goes back further you might have negative numbers.
If your code does not work then please post the SAS log from the step you ran that did not work. Include any error messages and notes. Make sure to use the Insert Code icon in the forum editor to paste the lines of text from the SAS log so the formatting is preserved. If there are no error messages in the LOG then explain why you know it did not work.
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